Principle requirements for strainer selection
The strainer is a small device that removes a small amount of solid particles in the liquid or gas, which can protect the normal operation of the equipment. When the fluid enters the strainer cartridge with a certain size strainer, the impurities are blocked, and the clean filtrate is discharged from the strainer. When it needs to be cleaned, just take out the detachable strainer cartridge and reinstall it after processing.
1. Strainer inlet and outlet diameter:
In principle, the diameter of the inlet and outlet of the strainer should not be smaller than the inlet diameter of the matching pump, which is generally consistent with the diameter of the inlet pipeline.
2. Nominal pressure selection:
Determine the pressure rating of the strainer according to the highest possible pressure in the strainer line.
3. The choice of mesh number:
The selection of strainer pore size mainly considers the impurity particle size to be intercepted, which is determined according to the process requirements of the medium. For the particle size that can be intercepted by wire mesh of various specifications, please refer to the table "strainers Specifications" below.
4. Strainer material:
The material of the strainer is generally selected to be the same as that of the connected process pipeline. For different service conditions, strainers made of cast iron, carbon steel, low alloy steel or stainless steel can be considered.
5. Calculation of strainer resistance loss:
For water strainers, the pressure loss is 0.52 ~ 1.2kpa under the general calculation of the rated flow rate.
Strainer application
1. Stainless steel strainer
Stainless steel strainers are widely used in pipelines of steam, air, water, oil, and other media; to protect various equipment, pumps, valves, etc. in the pipeline system; to avoid blockage caused by impurities such as rust and welding slag in the pipeline and damage. The stainless steel strainer has strong anti-pollution, convenient sewage discharge, large circulation area, small pressure loss, simple structure, small size and light weight. The strainer material is made of stainless steel, which has strong corrosion resistance and long service life.
2. Y-type strainer
Y-type strainer is an indispensable strainer device for the pipeline system of conveying medium. Y-type strainer is usually installed at the inlet end of pressure reducing valve, pressure relief valve, fixed water level valve or other equipment to remove impurities in the medium. To protect the normal use of valves and equipment. The Y-type strainer has the characteristics of advanced structure, small resistance and convenient sewage discharge.
3. Y-type pull rod telescopic strainer
The Y-type tie-rod telescopic strainer adopts a new design, combining the Y-type strainer with the expansion joint, which has a simple structure and is easy to use. Tie rod telescopic strainer is mainly used for water supply and drainage piping in high-rise buildings, multi-storey buildings or factories. It is usually installed at the inlet of pressure reducing valve, pressure relief valve, fixed water level valve or other major equipment. It is convenient to install the pull rod telescopic strainer. Cut off pipeline debris or install and disassemble to ensure the normal use of valves or equipment.
4. Basket strainer
Basket strainer is a small device that removes a small amount of solids in the liquid, which can protect the normal operation of compressors, pumps and other equipment and instruments; it is also a small device that improves product purity and purifies gases. Therefore, basket strainers are widely used in petroleum, chemical, chemical fiber, pharmaceutical, food and other industries. The basket strainer is composed of a shell, a sewage cover, a strainer element, a strainer screen, and bolts.
5. T-type strainer
T-type strainers are widely used in pipelines with various media such as steam, air, water, oil, etc., to protect various equipment on the pipeline system, such as water pumps, valves, etc., from rust, welding slag and other sundries in the pipeline. to blockage and damage to the pipeline. The T-type strainer produced by Shanghai Rimei Valve Manufacturing Co., Ltd. has the characteristics of strong anti-pollution performance, convenient sewage discharge, large flow area, small pressure loss, simple structure, and small size; the strainer material of the T-type strainer is stainless steel. Strong corrosion resistance and long service life; T-type strainer is also divided into direct flow type and baffle type. The density of the strainer mesh is 10 mesh to 120 mesh, and the temperature is 0~450°C.
